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<h2><a href="closure_goog_messaging_deferredchannel.js.html">deferredchannel.js</a></h2>

<pre class="prettyprint lang-js">
<a name="line1"></a>// Copyright 2010 The Closure Library Authors. All Rights Reserved.
<a name="line2"></a>//
<a name="line3"></a>// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
<a name="line4"></a>// you may not use this file except in compliance with the License.
<a name="line5"></a>// You may obtain a copy of the License at
<a name="line6"></a>//
<a name="line7"></a>//      http://www.apache.org/licenses/LICENSE-2.0
<a name="line8"></a>//
<a name="line9"></a>// Unless required by applicable law or agreed to in writing, software
<a name="line10"></a>// distributed under the License is distributed on an &quot;AS-IS&quot; BASIS,
<a name="line11"></a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a name="line12"></a>// See the License for the specific language governing permissions and
<a name="line13"></a>// limitations under the License.
<a name="line14"></a>
<a name="line15"></a>/**
<a name="line16"></a> * @fileoverview A MessageChannel decorator that wraps a deferred MessageChannel
<a name="line17"></a> * and enqueues messages and service registrations until that channel exists.
<a name="line18"></a> *
<a name="line19"></a> */
<a name="line20"></a>
<a name="line21"></a>goog.provide(&#39;goog.messaging.DeferredChannel&#39;);
<a name="line22"></a>
<a name="line23"></a>goog.require(&#39;goog.Disposable&#39;);
<a name="line24"></a>goog.require(&#39;goog.async.Deferred&#39;);
<a name="line25"></a>goog.require(&#39;goog.messaging.MessageChannel&#39;); // interface
<a name="line26"></a>
<a name="line27"></a>
<a name="line28"></a>
<a name="line29"></a>/**
<a name="line30"></a> * Creates a new DeferredChannel, which wraps a deferred MessageChannel and
<a name="line31"></a> * enqueues messages to be sent once the wrapped channel is resolved.
<a name="line32"></a> *
<a name="line33"></a> * @param {!goog.async.Deferred} deferredChannel The underlying deferred
<a name="line34"></a> *     MessageChannel.
<a name="line35"></a> * @constructor
<a name="line36"></a> * @extends {goog.Disposable}
<a name="line37"></a> * @implements {goog.messaging.MessageChannel}
<a name="line38"></a> */
<a name="line39"></a>goog.messaging.DeferredChannel = function(deferredChannel) {
<a name="line40"></a>  goog.base(this);
<a name="line41"></a>  this.deferred_ = deferredChannel;
<a name="line42"></a>};
<a name="line43"></a>goog.inherits(goog.messaging.DeferredChannel, goog.Disposable);
<a name="line44"></a>
<a name="line45"></a>
<a name="line46"></a>/**
<a name="line47"></a> * Cancels the wrapped Deferred.
<a name="line48"></a> */
<a name="line49"></a>goog.messaging.DeferredChannel.prototype.cancel = function() {
<a name="line50"></a>  this.deferred_.cancel();
<a name="line51"></a>};
<a name="line52"></a>
<a name="line53"></a>
<a name="line54"></a>/** @override */
<a name="line55"></a>goog.messaging.DeferredChannel.prototype.connect = function(opt_connectCb) {
<a name="line56"></a>  if (opt_connectCb) {
<a name="line57"></a>    opt_connectCb();
<a name="line58"></a>  }
<a name="line59"></a>};
<a name="line60"></a>
<a name="line61"></a>
<a name="line62"></a>/** @override */
<a name="line63"></a>goog.messaging.DeferredChannel.prototype.isConnected = function() {
<a name="line64"></a>  return true;
<a name="line65"></a>};
<a name="line66"></a>
<a name="line67"></a>
<a name="line68"></a>/** @override */
<a name="line69"></a>goog.messaging.DeferredChannel.prototype.registerService = function(
<a name="line70"></a>    serviceName, callback, opt_objectPayload) {
<a name="line71"></a>  this.deferred_.addCallback(function(resolved) {
<a name="line72"></a>    resolved.registerService(serviceName, callback, opt_objectPayload);
<a name="line73"></a>  });
<a name="line74"></a>};
<a name="line75"></a>
<a name="line76"></a>
<a name="line77"></a>/** @override */
<a name="line78"></a>goog.messaging.DeferredChannel.prototype.registerDefaultService =
<a name="line79"></a>    function(callback) {
<a name="line80"></a>  this.deferred_.addCallback(function(resolved) {
<a name="line81"></a>    resolved.registerDefaultService(callback);
<a name="line82"></a>  });
<a name="line83"></a>};
<a name="line84"></a>
<a name="line85"></a>
<a name="line86"></a>/** @override */
<a name="line87"></a>goog.messaging.DeferredChannel.prototype.send = function(serviceName, payload) {
<a name="line88"></a>  this.deferred_.addCallback(function(resolved) {
<a name="line89"></a>    resolved.send(serviceName, payload);
<a name="line90"></a>  });
<a name="line91"></a>};
<a name="line92"></a>
<a name="line93"></a>
<a name="line94"></a>/** @override */
<a name="line95"></a>goog.messaging.DeferredChannel.prototype.disposeInternal = function() {
<a name="line96"></a>  this.cancel();
<a name="line97"></a>  goog.base(this, &#39;disposeInternal&#39;);
<a name="line98"></a>};
</pre>


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